17世纪初建立的英国东印度公司曾经辉煌一时，但19世纪中期以后它的经营却日益困难并最终解体。上述现象出现的背景是( )
A：殖民掠夺的经营方式难以持久
B：商业垄断导致经营效率低下
C：英国对亚洲市场的依赖性减弱
D：英国的经济政策发生重大转变
45,55,65,____、____、____
如果气雾能解决空气供应问题，则预期的实验结果是____。
阅读下列材料，回答问题。
Take a look at the following ads! You may find some useful information you need here!
Piano lessons
Experienced musician from Australia. Good at teaching kids for 5 years!
For more information, please visit Larry's website: www.music.com.au
Lost cat
Medium size, with brown spots and white short hair. Answer you when you call it David. Many thanks for sending it back.
Call Susan at 7328059.
Guide wanted
Full time or part time.
Experience and a good knowledge of the city are necessary.
English is also a must.
Under 30 years old.
Call Mr. White at 5132683.
Apartment for sale
Three bedrooms, a kitchen and two bathrooms.
Beautiful sights out of the windows.
E-mail: sdgt@163.com.
小麦的叶肉细胞和人体的神经细胞都具有的结构有（ ）
①细胞壁 ②细胞膜 ③叶绿体 ④线粒体 ⑤细胞核 ⑥中央大液泡 ⑦细胞质．
选出句子中你所听到的单词（ ）
